TW202001937A - Transmission-signal cable and manufacturing method thereof - Google Patents

Abstract

A transmission-signal cable has a cable and a characteristic load. The cable has an inner conductor and an outer conductor, wherein the outer conductor surrounds with an outer surface of the inner conductor and insulates with the inner conductor, the cable has a signal-transmission section, each of two ends of the signal-transmission section respectively has a transferring part, the transferring part in one end of the signal-transmission section connects the inner conductor of the cable to the outer conductor of the signal-transmission section and connects the outer conductor of the cable to the inner conductor of the signal-transmission section, and the transferring part in the other end of the signal-transmission section connects the outer conductor of the signal-transmission section to the inner conductor of the cable and connects the inner conductor of the signal-transmission section to the outer conductor of the cable. The characteristic load is mounted on a terminal end of the cable.

Description

Cable for transmitting signal and manufacturing method thereof

The invention relates to a cable, especially a cable capable of transmitting signals.

Leaky coaxial cable (Leaky coaxial cable or Radiating cable) includes an inner conductor and an outer conductor with multiple holes. The inner conductor is insulated and covered by the outer conductor and is the path of radio frequency (RF, Radio Frequency) signal transmission on the cable. The part of the outer conductor that is not provided with holes will shield the radiation of radio frequency signals, and the hole of the outer conductor becomes radio frequency The launch point of the signal for the radio frequency signal to radiate outward. Therefore, the leaky coaxial cable is widely used in areas such as railway tunnels, MRT stations, mines, airports or underground buildings where wireless signals are not easy to propagate.

However, the number and shape of the holes formed on the outer conductor of the leaky coaxial cable and the distribution pattern among the multiple holes are all related to the area of the RF signal emission, which affects the wavelength, power and signal emission of the RF signal, etc. Electromagnetic wave characteristics, so that the radio frequency signal emitted by the leaky coaxial cable cannot meet certain requirements (for example: radio frequency identification (RFID) must be able to read the chip under the condition of sufficient radio frequency signal power and signal volume).

Therefore, in order to solve the above problems, the object of the present invention is to provide a cable with improved radio frequency signal transmission efficiency.

The technical means adopted by the present invention to solve the problems of the conventional technology is to provide a cable for transmitting signals, including a cable body, having an inner conductor and an outer conductor, wherein the outer conductor is covered by the inner conductor The outer periphery is insulated from the inner conductor. One end of the cable body is used to connect a signal source to transmit an identification signal on the inner conductor and the cable body has a signal transmission section. Both ends of the signal transmission section have a switch The connecting part, the transition part at one end of the signal transmitting section connects the inner conductor of the cable body to the outer conductor of the signal transmitting section and connects the outer conductor of the cable body to the inner conductor of the signal transmitting section to make the identification The signal is radiated to the outside by switching the signal transmission path to the outer conductor of the signal transmitting section by the inner conductor of the cable body, and the transition part at the other end of the signal transmitting section connects the outer conductor of the signal transmitting section to the cable body And connect the inner conductor of the signal transmission section to the outer conductor of the cable body, so that the identification signal switches the signal transmission path from the outer conductor of the signal transmission section to the inner conductor of the cable body for signal transmission ; And a characteristic load, installed at the other end of the cable body.

In an embodiment of the invention, a cable for transmitting signals is provided, wherein the inner conductor of the cable body is welded to the outer conductor of the signal transmission section, and the outer conductor of the cable body is welded to the signal transmission section Inner conductor.

In an embodiment of the present invention, a cable for transmitting signals is provided, wherein the transition part is a transition circuit board, and the inner conductor of the cable body is connected to the outer conductor of the signal transmission section, and connected The outer conductor of the cable body to the inner conductor of the signal transmitting section.

In an embodiment of the invention, a cable for transmitting signals is provided, wherein the cable body and the signal transmitting section are connected to the switching circuit board through a high-frequency connector.

In an embodiment of the invention, a cable for transmitting signals is provided, wherein the characteristic load is a characteristic resistance.

The technical method adopted by the present invention to solve the problems of the conventional technology is to additionally provide a method for manufacturing a cable for transmitting signals, which includes the following steps: a cable material preparation step, preparing a cable body and a characteristic load, wherein the cable The wire body has an inner conductor and an outer conductor, the outer conductor is wrapped around the outer periphery of the inner conductor and insulated from the inner conductor; the signal source connection step is to connect one end of the cable body to a signal source to the inner conductor Transmitting an identification signal; the first signal switching step, connecting the inner conductor of the cable body to the outer conductor of a signal transmitting section of the cable body through an adapter provided in the cable body and connecting the cable The outer conductor of the body to the inner conductor of the signal transmission section, so that the identification signal is radiated to the outside by switching the signal transmission path from the inner conductor of the cable body to the outer conductor of the signal transmission section; the second signal switching step, through Another transition portion provided in the cable body connects the outer conductor of the signal transmission section to the inner conductor of the cable body and connects the inner conductor of the signal transmission section to the outer conductor of the cable body, so that the The identification signal is switched from the outer conductor of the signal transmission section to the inner conductor of the cable body for signal transmission; and the characteristic load installation step is to install the characteristic load on the other end of the cable body.

The cable for transmitting signals and the manufacturing method thereof according to the embodiments of the present invention have the following effects. The cable for transmitting a signal according to an embodiment of the present invention achieves the switching of the identification signal between the inner conductor of the cable body and the outer conductor of the signal transmitting section through the transition part, and by using the signal transmitting section The outer conductor completely radiates the identification signal to the outside, so as to improve the amount and power of the radio frequency signal and perform certain required communication operations (for example, radio frequency identification operations).

The following describes the embodiments of the present invention based on FIGS. 1 to 4. This description is not intended to limit the embodiments of the present invention, but is one of the examples of the present invention.

Please refer to FIGS. 1 to 3, a cable 100 for transmitting signals includes a cable body 1 and a characteristic load 2. The cable body 1 has an inner conductor 11 and an outer conductor 12, wherein the outer conductor 12 is wrapped around the outer periphery of the inner conductor 11 and insulated from the inner conductor 11. One end of the cable body 1 is connected to a signal source S to transmit an identification signal RS on the inner conductor 11 and the cable body 1 has a signal transmission section 1A. The two ends of the signal transmitting section 1A respectively have a transition part 13A, 14A. The transition part 13A at one end of the signal transmitting section 1A connects the inner conductor 11 of the cable body 1 to the outer conductor 12A of the signal transmitting section 1A and The outer conductor 12 of the cable body 1 is connected to the inner conductor 11A of the signal transmitting section 1A, and the identification signal RS is switched from the inner conductor 11 of the cable body 1 to the outer conductor of the signal transmitting section 1A 12A to radiate to the outside world; and, the transition portion 14A at the other end of the signal transmitting section 1A connects the outer conductor 12A of the signal transmitting section 1A to the inner conductor 11 of the cable body 1 and connects the inner conductor of the signal transmitting section 1A 11A to the outer conductor 12 of the cable body 1, so that the identification signal RS switches the signal transmission path from the outer conductor 12A of the signal transmission section 1A to the inner conductor 11 of the cable body 1 for signal transmission.

As shown in FIG. 2, specifically, the outer conductor 12 is electrically insulated around the outer periphery of the inner conductor 11 through the insulating layer N1, and the outer peripheral surface of the outer conductor 12 is further covered with an insulating sheath N2 to achieve The outer conductor 12 insulates and protects the cable body 1. The outer conductor 12 of the cable body 1 shields the radiation of the identification signal RS on the inner conductor 11 and prevents external noise from interfering with the identification signal RS to ensure the transmission of the identification signal RS.

As shown in FIG. 1, the characteristic load 2 is installed at the other end of the cable body 1 to maintain the transmission quality of the identification signal RS. In the embodiment of the present invention, the characteristic load 2 is a characteristic resistance (or termination resistance). Of course, the characteristic load 2 can also be formed by a capacitor, an inductor, a transformer, or a voltage regulator.

For example, at the transition portions 13A and 14A of the signal transmission section 1A, the inner conductor 11 of the cable body 1 is welded to the outer conductor 12A of the signal transmission section 1A, and the outer conductor 12 of the cable body 1 Solder to the inner conductor 11A of the signal emitting section 1A.

In the present invention, the technical means for connecting between the cable body 1 and the signal transmitting section 1A is not limited to welding. As shown in FIG. 1, when the adapter portion 13A is an adapter circuit board 3, the present invention connects the inner conductor 11 of the cable body 1 to the outer conductor of the signal transmission section 1A through the adapter circuit board 3 12A, and connects the outer conductor 12 of the cable body 1 to the inner conductor 11A of the signal transmitting section 1A. Further, the cable body 1 and the signal transmission section 1A are connected to the switching circuit board 3 through a high-frequency connector 4 to ensure that the identification signal RS is switched between the cable body 1 and the signal transmission section 1A Stability.

Referring to FIG. 4, a method for manufacturing a cable 100 for transmitting signals includes the following steps: cable material preparation step P1, preparing a cable body 1 and a characteristic load 2, wherein the cable body 1 has a An inner conductor 11 and an outer conductor 12, the outer conductor 12 covering the outer periphery of the inner conductor 11 and insulated from the inner conductor 11; the signal source connecting step P2, connecting one end of the cable body 1 to a signal source S and An identification signal RS is transmitted on the inner conductor 11; the first signal switching step P3 connects the inner conductor 11 of the cable body 1 to the cable body 1 through an adapter 13A provided in the cable body 1 An outer conductor 12A of the signal transmitting section 1A and connecting the outer conductor 12 of the cable body 1 to the inner conductor 11A of the signal transmitting section 1A, so that the identification signal RS is transmitted by the inner conductor 11 of the cable body 1 to switch signals The path to the outer conductor 12A of the signal transmission section 1A is radiated to the outside world; the signal second switching step P4 is connected to the outer conductor 12A of the signal transmission section 1A through another transition portion 14A provided in the cable body 1 The inner conductor 11 of the cable body 1 connects the inner conductor 11A of the signal transmission section 1A to the outer conductor 12 of the cable body 1, so that the identification signal RS is transmitted by the outer conductor 12A of the signal transmission section 1A switching signal transmission Route to the inner conductor 11 of the cable body 1 for signal transmission, and the outer conductor 12 of the cable body 1 shields the radiation of the identification signal RS; and the characteristic load installation step P5, the characteristic load 2 is installed on the cable The other end of the wire body 1.

In the cable 100 for transmitting a signal according to an embodiment of the present invention, the identification signal RS is switched from the inner conductor 11 of the cable body 1 to the outer conductor 12A of the signal transmitting section 1A through the adapter 13A to radiate to The outside world, and the identification signal RS is switched from the outer conductor 12A back to the inner conductor 11 of the cable body 1 through the adapter 14A again for signal transmission. In detail, under the condition of maintaining a complete RF signal transmission area, the identification signal RS is completely radiated to the outside through the outer conductor 12A of the signal transmission section 1A (ie, the transmitting antenna of the identification signal RS), In order to improve the transmission amount and power of the radio frequency signal RS, it is possible to perform communication operations that meet special specifications. In other words, the signal transmission area of the outer conductor 12A is larger than the signal transmission area provided by the holes on the outer conductor of the leaky coaxial cable (and the number, shape and distribution of the holes will also affect the wavelength and power of the RF signal), and The invention can thereby increase the transmission amount of the radio frequency signal RS to perform some communication operations with special specifications (such as wireless radio frequency identification).

In addition, the cable 100 for transmitting a signal according to an embodiment of the present invention ensures the transmission stability and signal quality of the identification signal RS through the characteristic load 2, the adapter circuit board 3, and the high-frequency connector 4.

The above description and description are only for the description of the preferred embodiments of the present invention. Those with ordinary knowledge of this technology can make other modifications based on the scope of the patent application defined below and the above description, but these modifications should still be It is within the scope of the rights of the invention for the spirit of the invention.

100‧‧‧Cable 1‧‧‧Cable body 1A‧‧‧Signal transmitting section 11, 11A‧‧‧Inner conductor 12, 12A‧‧‧Outer conductor 13A, 14A‧‧‧Adapter part 2‧‧‧Characteristic load 3‧‧‧Converter circuit board 4‧‧‧High frequency connector N1‧‧‧Insulation layer N2‧‧‧‧Insulation jacket P1‧‧‧Cable material preparation step P2‧‧‧Signal source connection step P3‧‧‧Signal first Switching step P4‧‧‧Signal second switching step P5‧‧‧Feature load installation step RS‧‧‧Identify signal S‧‧‧Signal source

Figure 1 is a schematic diagram showing the appearance of a cable for transmitting signals according to an embodiment of the present invention; Figure 2 is a schematic cross-sectional view showing a transverse section of a cable body according to an embodiment of the present invention; Figure 3 is a display A schematic longitudinal cross-sectional view of a cable for transmitting signals according to an embodiment of the present invention; and FIG. 4 is a flowchart showing a manufacturing method of a cable for transmitting signals according to an embodiment of the present invention.

100‧‧‧Cable

1‧‧‧Cable body

1A‧‧‧Signal launch section

13A, 14A‧‧‧Transfer

2‧‧‧Characteristic load

3‧‧‧Transfer circuit board

4‧‧‧High frequency connector

S‧‧‧Signal source

Claims (10)

A cable for transmitting signals includes a cable body having an inner conductor and an outer conductor, wherein the outer conductor is wrapped around the outer periphery of the inner conductor and insulated from the inner conductor, and one end of the cable body is used An identification signal is transmitted to the inner conductor by connecting a signal source and the cable body has a signal transmitting section, and both ends of the signal transmitting section respectively have a transition part, and the transition part at one end of the signal transmission section is connected to the cable The inner conductor of the body is connected to the outer conductor of the signal transmission section and the outer conductor of the cable body is connected to the inner conductor of the signal transmission section, so that the identification signal is switched from the inner conductor of the cable body to the signal transmission path to the signal The outer conductor of the transmitting section radiates to the outside world, and the transition part at the other end of the signal transmitting section connects the outer conductor of the signal transmitting section to the inner conductor of the cable body and connects the inner conductor of the signal transmitting section to the cable The outer conductor of the body, so that the identification signal is switched from the outer conductor of the signal transmitting section to the inner conductor of the cable body for signal transmission; and a characteristic load is installed at the other end of the cable body. The cable for transmitting signals according to claim 1, wherein the inner conductor of the cable body is welded to the outer conductor of the signal transmitting section, and the outer conductor of the cable body is welded to the inner conductor of the signal transmitting section. The cable for transmitting signals according to claim 1, wherein the transition part is a transition circuit board, and the inner conductor of the cable body is connected to the outer conductor of the signal transmission section, and the cable body is connected The outer conductor of the signal to the inner conductor of the signal transmission section. The cable for transmitting signals according to claim 3, wherein the cable body and the signal transmitting section are connected to the switching circuit board through a high-frequency connector. The cable for transmitting signals as described in claim 1, wherein the characteristic load is a characteristic resistance. A method for manufacturing a cable for signal transmission includes the following steps: a cable material preparation step, preparing a cable body and a characteristic load, wherein the cable body has an inner conductor and an outer conductor, the outer conductor is wrapped in The outer periphery of the inner conductor is insulated from the inner conductor; a signal source connection step, connecting one end of the cable body to a signal source and transmitting an identification signal on the inner conductor; a first signal switching step through the cable body A transition part is provided to connect the inner conductor of the cable body to the outer conductor of a signal transmitting section of the cable body and connect the outer conductor of the cable body to the inner conductor of the signal transmitting section to make the identification The signal is radiated to the outside by the inner conductor of the cable body switching the signal transmission path to the outer conductor of the signal transmitting section; the second signal switching step is connected to the signal transmission through another transition part provided in the cable body The outer conductor of the segment to the inner conductor of the cable body and connect the inner conductor of the signal transmitting segment to the outer conductor of the cable body, so that the identification signal switches the signal transmission path from the outer conductor of the signal transmitting segment to the cable The inner conductor of the wire body performs signal transmission; and the step of installing the characteristic load, the characteristic load is installed on the other end of the cable body. The method for manufacturing a cable for transmitting a signal according to claim 6, wherein in the first switching step of the signal and the second switching step of the signal, the inner conductor of the cable body is welded to the outer conductor of the signal transmitting section, And the outer conductor of the cable body is welded to the inner conductor of the signal transmitting section. The method for manufacturing a cable for transmitting a signal according to claim 6, wherein in the first switching step of the signal and the second switching step of the signal, the transition part is a transition circuit board, and the cable body is connected To the outer conductor of the signal transmission section, and connect the outer conductor of the cable body to the inner conductor of the signal transmission section. The method for manufacturing a cable for transmitting a signal according to claim 8, wherein the cable body and the signal transmitting section are connected to the switching circuit board through a high-frequency connector. The method for manufacturing a cable for transmitting a signal as described in claim 6, wherein the characteristic load is a characteristic resistance.

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